Eid perhaps represents a problem for established services? (7)

I believe the answer is:

dieback

I'm a little stuck... Click here to teach me more about this clue!

'established services?' is the definition.
The definition suggests a singular noun which matches the answer.

'eid perhaps represents a problem' is the wordplay.
I cannot really see how this works, but
an anagram of 'eid' is 'die' which is within the answer.
'perhaps' could be 'back' (I've seen this in other clues) and 'back' is present in the answer.
No letters remain.
This may be the basis of clue (or it may be nonsense).

'for' is the link.

Can you help me to learn more?

I've seen this clue in The Independent.

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